JEAN Claude-Juncker, EU Commission president, has launched a stinging attack on Boris Johnson saying the suggestion the European Union is plotting to create a European superstate is “total nonsense”.

The EU boss said he was not “stupid” after Foreign Secretary Boris Johnson delivered his Brexit speech in London this afternoon in a bid to unite Remainers and Brexiteers.

Jean-Claude Juncker said dismissed the claim he wanted to build a European superstate and accused some in the British political establishment of “pretending that I am a stupid stubborn federalist”.

He insisted he was “strictly against a European superstate”, telling a press conference in Brussels: “Some in the British political society are against the truth, pretending that I am a stupid, stubborn federalist, that I am in favour of a European superstate.

"I am strictly against a European superstate. We are not the United States of America, we are the European Union, which is a rich body because we have these 27, or 28, nations.